Food obtained from fish and process of making the same



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SADAKIGEI SATOW, OF SENDAI, JAPAN.

roon on'rarnnn rno r rrsu 1,370,049; No Drawing. I

To allwhom it may concern:

Be it known that I, SADAKICHI Sa'row, a subject of the Emperor of Japan, residing at Sendai, Japan, have made a'certain new and useful Invent on in Food Obtained from Fish and Processes of Making the Same, of

which the following is a specification.

In the 'manufacture of fish oil as ordinarily carried out, it is common practice to boil the fish, in the operation of separating the oil therefrom, and after the oil is recovered theresidue is thrown away or sold and used as a soil fertilizer.

, It isamong the special purposes of my present invention to utilize this residue in the manufacture of a cheap and nutritious human food product. r

In car out my invention, I take the cooked resi ue from the manufacture of fish oil,.and crush or the same into a paste, which. is then dried, under high vacuum and low temperature, ea 29 inches and from,40 F.-to 50? R, an the drieth massis crushed or groundinto a powder. This owder contains-the cooked fish flesh, umen of which has been coagulat'ed by the heat employed in the cooking or boil' operation; as w fi as the scales, in case the latter have not been removed before the cooking operation, all of which have been crushed or ground to a powder in producing the paste.

The powder obtained as above described keeps indefinitely without deterioration, alteration, or putrefactiom For use as a food product it is mixed with a sufficient quantity of water to form a paste which is then cooked in hot or boiling water,

thereby roducin a nutritious, palatable food pro not having the natural taste and wise reduced to dryness under high vacuumand low tem erature and crushed or ground into a pow er. In case an alkline reagent is employed as a solvent for the albumen it is of course necessary to neutralize the extract. This may be accomplished in any well known manner.

The albumen obtained in an of the ways above described is transforme into soluble Specification of Letters Patent.

t also contains the bones,

AND PROCESS OF MAKING THE Patented Mar. 1, 1921.

Application filed Kay 5, 1917. Serial H0. 188,622.

form in any suitable manner, for example wlth a proteolytic enzyme','such as pepsin, trypsin, or other albumen digesting ferment. The tranformed mass is then treated with water to extract the soluble matter contamed therein. This extract is then purified by filtration, or otherwise rand the purified extract 1s evaporated under high vacuum and low tem rature. This eva ratedmass, which, if desired, may be crushed into a powder, and containing predigested albumen as well as proteolytic enzyme, constitutes a highly nutritious and digestible food product. v

By employing a high vacuum and low temperature in carrying out 'myinvention I avoid deterioration or putrefaction of the coagulated albumen which would result if ordinary atmospheric or higher ressures and teneiperatures are employed. The heat employ in initially cookin or boiling the raw fish merely coagulates t e'albumen and does not decompose or putrefy the same. If, however, high temperature is employed with ordinary atmospheric or high premures in drying .the albumen, or in eva rating the mass containing the albumen, eterioration and putrefaetion of the albumen will take place.v This would be beneficial and useful fora soil fertilizerbut fatal for a human food product. Therefore, to avoid this serious difliculty in carrying out my invention, l em loy high vacuum and low temperature in e ectmg the drying or evaporation of the mass containing the coaguiated albumen. This I regard as a very important and valuablefeature of m iIIVGIltlOlL This method 0 treatment, in' accordance with the principle of my invention, is exceedingly valuable and important in the treatment of the residue of fish oil manu-- facture, in that it enables such residue to be employed in the manufacture of an excellent cheap human food product from waste material now used principally as a soil In the manufacture of fish oil, as ordinarily carried out the fish is boiled in the o tion of separating the oil, and after t e oil is recovered, the residue is dried at ordinary atmospheric premure and ordinary temperature and sold as a fertilizer. It is this raidue that I utilize, in accordance with my invention, in the manufadzure of a useful human food product.

. Having now set forth the objects and nature 0 my invention, and the manner of carrying the same into efiect, what I claim as new and useful, and of my own invention,

and desire to secure by Letters Patent is:-

1. In the manufacture of a human food 5 product from the cooked residue from fish oilmanufacture, the process which consists in crushin or inding such residue into a paste, andt en rying such paste under hi hvacuum and at a'temperature below 50 r1 1-0 and then crushing or grinding the (1 mass into a powder.

2. In the manufacture of a human food product-from the cooked residue from fish oil 'ma'nufacture,-the process which consists a-paste, and then drying such paste under high vacuum and at a temperature below 50 F., then crushing or grinding the dried mass into a powder, and extracting the powder with an albumen solvent.

3. In the manufacture of a human'food product from the cooked residue from fish oil manufacture, the process which consists in crushing or rinding such residue into a paste, and then rying such paste under high in crushing or grinding such residue into' vacuum and at a temperaturelbelow F., a

then crushing or rinding the dried mass into a powder, and then 'transformin the albumen content of the mas into'souble form with a proteolytic enzyme.

'4. In the manufacture of a human food product'from the cooked residue from fish oil manufacture, the process which consists in crushing or rinding such residue into a paste, and then rying such paste under big vacuum and at a temperature below 50 p then crushing or nding the dried mass into a powder, an then transformin the albumen content of the mass into so uble form with a proteolyticenzyme, then extracting with water the soluble albumen, and eva rating the extract under high vacuum an low temperature, and finally crushing or grinding the evaporated mass into a powder.

' .In testimony whereof I have hereunto sgt'r7ny hand on this 30th dayof April, A. D. 1 1

' sADA tqHI SATOW. 

